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                <span class="article-type type-1 float-left">原</span>                <h1 class="title-article">MySQL按时间分组求和</h1>
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                                                                                                                                            <span class="time">2016年12月15日 10:41:33</span>
                    <a class="follow-nickName" href="https://me.csdn.net/killerpro" target="_blank">fatshen</a>
                    <span class="read-count">阅读数 4130</span>
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                                            <p><a href="https://zhidao.baidu.com/question/874262255129444252.html" rel="nofollow" data-token="1064d563bb7b8905ddd79c855010a83c">mysql如何按月求和，时间格式为1430795781</a></p>

<p>修改一下这个问题为：</p>

<blockquote>
  <p>比如说，当前的数据表是这样的， <br>
  id time amount name <br>
  1 1430795781 200 a <br>
  2 1431335833 900 a <br>
  3 1431335833 400 b <br>
  4 1431332616 100 b <br>
  5 1431332616 200 c <br>
  6 1431332616 200 b <br>
  请问各位高人，如何才能先把相同月份的数据相加然后再列出不同月份的数据的，最后的结果是这样的 <br>
  a 1月份 XXX元 <br>
  a 2月份 XXX元 <br>
  a 3月份 XXX元 <br>
  b 1月份 XXX元 <br>
  b 2月份 XXX元 <br>
  b 3月份 XXX元</p>
</blockquote>

<p>则SQL可以修改为</p>

<pre class="prettyprint"><code class=" hljs sql"><span class="hljs-operator"><span class="hljs-keyword">SELECT</span> name, FROM_UNIXTIME(<span class="hljs-string">`time`</span>, <span class="hljs-string">'%Y年 %c月份'</span>) <span class="hljs-keyword">AS</span> mth,CONCAT(<span class="hljs-aggregate">SUM</span>(amount),<span class="hljs-string">'元'</span>)  <span class="hljs-keyword">as</span> amount <span class="hljs-keyword">FROM</span> tb <span class="hljs-keyword">GROUP</span> <span class="hljs-keyword">BY</span> name, mth</span></code></pre>                                    </div>
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